Assuming youre a General Category Aspirant, you wont get HBTU Kanpur with a Percentile of 80 in JEE Main. Of course if youre from certain Category, you may pehaps have better chances in securing a seat at HBTU Kanpur.

For more information regarding HBTU Cutoff do follow the link below

https://www.careers360.com/university/harcourt-butler-technical-university-kanpur/amp

Regarding the Second part of youre Question, HBTU Kanpur is perhaps the best State Engineering College of UP, while VIT Vellore is one of the best Private Engineering Varsities. Both have their pros and cons. For more information and college comparison do follow the link below

https://www.careers360.com/compare-colleges